CN201402480Y

CN201402480Y - Paper money fluorescence spectrum detecting device

Info

Publication number: CN201402480Y
Application number: CN200920045335XU
Authority: CN
Inventors: 周望
Original assignee: Suzhou University
Current assignee: Suzhou University
Priority date: 2009-05-15
Filing date: 2009-05-15
Publication date: 2010-02-10
Anticipated expiration: 2019-05-15

Abstract

The utility model discloses a device for identifying the authenticity of paper money by adopting a fluorescence spectrum detecting method. The device comprises an ultraviolet light source, a receivingelement, a light split element, a spectrum data transduction element and an information processing module. The structure of the light path of the device is that the ultraviolet light emitted from theultraviolet light source irradiates to the ultraviolet light sense area of the identified paper money by an optical lens; after being collected by the receiving element above the ultraviolet light sense area, the excited fluorescence is projected onto the light split element to disperse into line spectrum by aperture converging; the line spectrum is directly converted into the digital signal by the spectrum data transduction element and then is input to the information processing module, so as to identify the authenticity by comparing the detected data with the fluorescence spectrum data of atrue money. The device can identify the authenticity of the paper money by the fluorescence spectrum; compared with the prior art that only the fluorescence intensity can be detected, the identifyingaccuracy rate is greatly improved; in addition, the device has the advantages of simple structure, good portability and flexibility, wide applicability and convenient use, and has practical value andapplication prospect.

Description

Bank note fluorescence spectrum pick-up unit

Technical field

The utility model relates to a kind of forge or true or paper money and sets device, and particularly a kind of method that adopts fluorescence spectrum to detect sets the device of forge or true or paper money, belongs to check bank note authenticity technical field.

Background technology

Paper money in circulation generally all is provided with the false proof measure of kind more than ten, and wherein, Ultraluminescence is false proof to be one of important techniques.For example, be provided with the UV photosensitive zone on the upper left side of the Renminbi that uses at present, when the purple light of 370～435nm shone, the UV photosensitive zone demonstrated tangible fluorescence hot spot and digital number.The money identifier of Ultraluminescence anti-counterfeiting detection or device utilize this physical characteristics inspection pseudo-just, yet the false proof money identifier of general Ultraluminescence only is the power that the specific region has or not photosensitive coating and fluorescence on the check bank note.The defective of the existing Ultraluminescence check of the many versions counterfeit money utilization that occurs in society counterfeit money technology, also be coated with and put ultraviolet fluorescent material in the specific region, reached and mixed the spurious with the genuine, made cash inspecting machine or automatic cashing machine ineffective, caused bad social influence and bigger economic loss.

Ultraviolet fluorescent material on the bank note is a kind of special secret prescription, though and the ultraviolet fluorescent material on the counterfeit money also has the effect of fluorescence, its essence be anything but with.Differentiate that with the light spectrum analysis method true and false of fluorescent material on the true and false bank note is than one of scientific methods, at present, Shang Weijian adopts portable and smart fluorescence spectrum pick-up unit that forge or true or paper money is discerned.

Summary of the invention

The purpose of this utility model provides a kind of to bank note fluorescence distinguish true from false accuracy rate height, applicability bank note fluorescence spectrum pick-up unit wide, portable and smart, easy to use.

Realize that the technical scheme that the present utility model purpose is adopted is: a kind of bank note fluorescence spectrum pick-up unit comprises ultraviolet source, receiving element, beam splitter, spectroscopic data conversion element and information processing component; Its light path is: the ultraviolet light that ultraviolet source sends shines the UV photosensitive zone of survey bank note to be identified through optical lens; After the receiving element above the UV photosensitive zone is with the phosphor collection that is inspired, converge by diaphragm, project that chromatic dispersion becomes line spectrum on the beam splitter, convert digital signal to through the spectroscopic data conversion element, be input to information processing component.

Described ultraviolet source is the LED ultraviolet source of 370～435nm wave band.

Described receiving element is the light-gathering optics lens.

Described beam splitter is made up of optics prism and optical lens; Or employing transmission-type grating device.

Described spectroscopic data conversion element adopts the line array CCD device.

Because the technique scheme utilization, the advantage that the utility model compared with prior art has is: be subjected to the fluorescence of ultraviolet excitation to measure qualitatively and analyze to bank note, improved the accuracy rate of differentiating forge or true or paper money; Adopting LED ultraviolet source and line array CCD device is technology such as spectroscopic data conversion element, advantage such as make bank note fluorescence spectrum pick-up unit have portable and smart, easy to use and applicability is wide.

Description of drawings

Accompanying drawing 1 is the structural representation of an embodiment of the utility model;

Accompanying drawing 2 is structural representations of another embodiment of the utility model;

Wherein: 1, the UV photosensitive zone of bank note; 2, light-gathering optics lens; 3, slit diaphragm; 4, optics prism; 5, light-gathering optics lens; 6, spectroscopic data conversion element line array CCD device; 7, light-gathering optics lens; 8, LED ultraviolet source; 9, transmission-type grating.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment 1:

Shown in accompanying drawing 1, present embodiment adopts the LED ultraviolet source 8 of 435nm wave band, through the UV photosensitive zone 1 of light-gathering optics lens 7 irradiations bank note to be identified.

Present embodiment adopts prism to carry out light-splitting processing, concrete structure is: be gathered into a branch of fluorescence to be measured (fluorescence is excited) with light-gathering optics lens 2, fluorescence beam is become line spectrum by slit diaphragm 3, optics prism 4 by chromatic dispersion, again behind image optics lens 5, be directly changed into discrete spectroscopic data by spectroscopic data conversion element line array CCD device 6, in the present embodiment, the spectroscopic data conversion element is selected the line array CCD of TSL3301-LF 102 pixels of Texas AdvancedOptoelectronic Solutions Inc. for use.Tested epipolic dispersion line spectrum images in line array CCD, is directly changed into discrete spectroscopic data (data width: 8 scale-of-two, resolution are 1/256).The one group of spectroscopic data that is obtained is input to message processing module.

Embodiment 2:

Shown in accompanying drawing 2, it is the LED ultraviolet source 8 of 395nm that present embodiment adopts centre wavelength, and working current is arranged on 12mA, utilizes the end face resin of LED self to be collector lens 7, shines the UV photosensitive zone 1 of bank note to be identified.

Present embodiment adopts grating to carry out light-splitting processing, concrete structure is: diameter is the fluorescence that 10 millimeters convex lens 2 are collected ultraviolet excitation, on the back focal plane of convex lens, place the slit 3 of a slice 0.2mm, nestle up slit and place the transmission grating 9 of a slice 20mm*200mm raster density d=600, the TSL3301-LF line array CCD of using TexasAdvanced Optoelectronic Solutions Inc. then is as the spectrum sensing element, this CCD has 102 sensitization pixels, 85 μ m (H) *, 77 μ m (W), and carry 8 ADC.By SCLK, SDIN, the three-way communication interface of SDOUT, the one group of spectroscopic data that is obtained is input to computing machine, after message processing module carries out data processing, confirm to be identified the true and false of bank note.

Can adopt device that the utility model provides that the fluorescence spectrum of genuine note is detected earlier, its spectroscopic data result is input in the information processing component stores, when the true and false of identification bank note, the spectroscopic data that is identified measured spectroscopic data of bank note and stored genuine note is compared, confirm to be identified the true and false of bank note.

Claims

1, a kind of bank note fluorescence spectrum pick-up unit, it is characterized in that: it comprises ultraviolet source, receiving element, beam splitter, spectroscopic data conversion element and message processing module; Its light channel structure is: the ultraviolet light that ultraviolet source [8] sends shines the UV photosensitive zone of bank note to be identified through optical lens [7]; After the receiving element above the UV photosensitive zone is with the phosphor collection that is inspired, converge by diaphragm [3], project that chromatic dispersion becomes line spectrum on the beam splitter, convert digital signal to through spectroscopic data conversion element [6], be input to message processing module.

2, a kind of bank note fluorescence spectrum pick-up unit according to claim 1, it is characterized in that: described ultraviolet source is the LED ultraviolet source of 370～435nm wave band.

3, a kind of bank note fluorescence spectrum pick-up unit according to claim 1, it is characterized in that: described receiving element is light-gathering optics lens [2].

4, a kind of bank note fluorescence spectrum pick-up unit according to claim 1, it is characterized in that: described beam splitter is made up of optics prism [4] and image optics lens [5].

5, a kind of bank note fluorescence spectrum pick-up unit according to claim 1, it is characterized in that: described beam splitter is transmission-type grating [9].

6, a kind of bank note fluorescence spectrum pick-up unit according to claim 1, it is characterized in that: described spectroscopic data conversion element is the line array CCD device.